[TAJO-833] NPE occurs when using the column as a alias name in the multiple DISTINCT.

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.9.0, 0.8.1
• Assignee: Hyoungjun Kim
• Reporter: Hyoungjun Kim
• Created: 19/May/14 15:15
• Updated: 21/May/14 03:03
• Resolved: 21/May/14 03:03

Description

See title. The next query using column name l_partkey as alias throws NPE.

select
    lineitem.l_orderkey as l_orderkey,
    lineitem.l_partkey as l_partkey,
    count(distinct lineitem.l_partkey) as cnt1,
    count(distinct lineitem.l_suppkey) as cnt2,
    sum(lineitem.l_quantity) as sum1
from
    lineitem
group by
    lineitem.l_orderkey, lineitem.l_partkey

2014-05-16 16:28:42,963 ERROR org.apache.tajo.worker.Task:
java.lang.NullPointerException
        at org.apache.tajo.storage.VTuple.getFloat8(VTuple.java:151)
        at org.apache.tajo.storage.RawFile$RawFileAppender.addTuple(RawFile.java:640)
        at org.apache.tajo.engine.planner.physical.HashShuffleFileWriteExec.next(HashShuffleFileWriteExec.java:120)
        at org.apache.tajo.worker.Task.run(Task.java:383)
        at org.apache.tajo.worker.TaskRunner$1.run(TaskRunner.java:391)
        at java.lang.Thread.run(Thread.java:744)